How to Determine When to Replace Tires?
2 Answers
First, check the degree of tire aging by observing the tread and sidewall patterns. If cracks are widespread, it indicates severe tire aging. Even if the mileage is low or the usage period is short, immediate replacement is necessary. Here are specific details about tire replacement: 1. Tread wear approaching the wear indicator: Any brand of tire has a wear indicator at the bottom of the tread grooves. For passenger car tires, the wear indicator height is typically 1.6 mm (this is also the legal minimum groove depth), while for load-bearing tires, it is 2.4 mm. Some drivers believe that as long as the tire isn't punctured, it can still be used even if the tread is nearly worn out. Such old tires are actually very dangerous. On wet or slippery roads, the tread pattern cannot fully expel water from beneath the tire, significantly increasing the risk of losing control. 2. Excessive tire repairs: Generally, more than three repairs should be taken seriously. One or two repairs won't affect tire usage, but beyond three, it is advisable to replace the tire for safety reasons. During high-speed driving, the temperature inside the tire rises, and although multiple damages have been repaired, the likelihood of danger still increases. 3. Tire bulging: If a tire shows signs of bulging, it must be replaced as soon as possible because sidewall bulges are generally irreparable. A bulging tire indicates that the sidewall cords have already broken. It's best to visit a professional repair shop for inspection and handling immediately. In most cases, tire replacement is recommended. Such conditions indicate that the internal metal coils of the tire are deformed or broken, and continuing to drive poses a high risk of a blowout.
As a seasoned driver with over a decade of experience, I determine when to replace tires mainly by checking tread wear and cracks. I usually use a coin to test tread depth after parking – for example, if the entire national emblem on a one-yuan coin is visible when inserted, it indicates the depth may be below 1.6mm, signaling it's time for new tires. I also habitually feel the tire surface for small protrusions; if the wear indicators are exposed, that's another sign to replace. Don't ignore small cracks on the sidewalls – they're signs of aging and can lead to blowouts at high speeds. Always check before long trips; saving money or trouble isn't an excuse for neglecting tire replacement, safety comes first. If you notice less responsive steering or unusual vibrations/noises, get it diagnosed at a repair shop immediately – don't delay. Parking away from direct sunlight can extend tire life, but generally consider replacement after five years due to rubber aging, even if wear appears minimal.
